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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26285] ShardCollection on existing collection can sometimes fail to create more than 1 chunk</title>
                <link>https://jira.mongodb.org/browse/SERVER-26285</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;It looks like there are some cases when splitVector is not called on the shard and shardCollection ends up just creating a single chunk for a huge collection.&lt;/p&gt;</description>
                <environment></environment>
        <key id="318483">SERVER-26285</key>
            <summary>ShardCollection on existing collection can sometimes fail to create more than 1 chunk</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="randolph@mongodb.com">Randolph Tan</assignee>
                                    <reporter username="randolph@mongodb.com">Randolph Tan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 23 Sep 2016 17:05:03 +0000</created>
                <updated>Wed, 25 Jan 2017 21:57:55 +0000</updated>
                            <resolved>Tue, 4 Oct 2016 21:06:52 +0000</resolved>
                                                    <fixVersion>3.4.0-rc1</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1400196" author="xgen-internal-githook" created="Tue, 4 Oct 2016 21:06:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26285&quot; title=&quot;ShardCollection on existing collection can sometimes fail to create more than 1 chunk&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26285&quot;&gt;&lt;del&gt;SERVER-26285&lt;/del&gt;&lt;/a&gt; Code cleanup for ShardingUptimeReporter&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/7e40ab701a38fcca2711e1f9ffb6b7ce403a351b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/7e40ab701a38fcca2711e1f9ffb6b7ce403a351b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1400195" author="xgen-internal-githook" created="Tue, 4 Oct 2016 21:06:23 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;renctan&apos;, u&apos;name&apos;: u&apos;Randolph Tan&apos;, u&apos;email&apos;: u&apos;randolph@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26285&quot; title=&quot;ShardCollection on existing collection can sometimes fail to create more than 1 chunk&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26285&quot;&gt;&lt;del&gt;SERVER-26285&lt;/del&gt;&lt;/a&gt; Make sure that the balancer settings gets refreshed periodically&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/d8b4ac75423456efd6401264e6d9c6b95d9b21e6&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/d8b4ac75423456efd6401264e6d9c6b95d9b21e6&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1397111" author="renctan" created="Thu, 29 Sep 2016 21:04:10 +0000"  >&lt;p&gt;Looks like the balancer configuration is currently only refreshed during startup and when the autosplit threshold is triggered. It means that there is a potential race between changing the setting in the config server document and the mongos reading the setting with the latest changes immediately after.&lt;/p&gt;</comment>
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